/**
 * 闪烁的小灯
 */

void setup() {
    // put your setup code here, to run once:
    pinMode(13, OUTPUT);
}

void loop() {
    // put your main code here, to run repeatedly:
    digitalWrite(13, HIGH);     //turn the LED on
    delay(1000);                // waite 1s
    digitalWrite(13, LOW);      //turn the led off
    delay(1000);                //waite ls
}
